120
NEW EXPERIMENTS
TRACT 34.
Table of Resistances to a Ball of 3 lb weight , and 2-78 inchesdiameter. Barom. 30.
Velocity
Resist.
Diffs
2 Diffs
feet
oz
900
566
78
85
92
98
104
110
116
121
126
131
135
138
141
143
144144
950
644
7
1000
729
7
1050
821
6
1100
919
6
1 150
1023
6
1200
1133
6
1250
1300
1249
1370
' 5
5
1350
1496
5
1400
1450
1627
1762
4
3
1500
1900
3
1550
1600
2041
2184
2
I
1650
2328
0
1700
2472
Resists
lbs
35-440-245-551-351-564-171'078-285-793-5101-6110-0118 6127-4136-4145"5154-6
Diffs
2 Diffs
4- 8
5- 3
5- 8
6 - 26-6
6- 9
7- 27"5
7- 8
8 - 1
8- 48-68-8
9- 09-19-1
5
5
4
4
3
3
3
3
3
3
2
2
2
1
0
General Observations on the Experiments of the year 1789.
168. The first set of these experiments was made to af-ford a comparison between guns of different lengths, the oneshort, and the other very long. They were both placedwith the muzzle at 30 feet distance from the face of the pen-dulum, being charged each time with 16 ounces ot powder,and the general weight of the balls 2lb 15oz. After a suffi-cient number of rounds with each gun, the medium veloci-ties, computed from them, were as follow; viz, the long gun1584 feet per second, and the short one 1371 feet. So thatthe velocity from the long gun exceeds that from the shortone, by a quantity between the 6th and 7th part of the lat-ter only.